Saville-Troike, Muriel, 1936-
Cambridge University Press , 2006
Buku Teks
Saville-Troike, Muriel, 1936-
Cambridge University Press, 2012
Buku Teks
Saville-Troike, Muriel, 1936-
Cambridge University Press, 2017
Buku Teks
Bloomer, Aileen, 1947-
Routledge , 2006
Buku Teks
Smith, Michael Sharwood, 1942-
Cambridge University Press, 2017
Buku Teks